<template>
  <div class="box">
    {{ 1 + 1 }}
  </div>
  <div>
    <button @click="add">添加</button>
  </div>
</template>
<script>
export default {
  data() {
    return {}
  },
  methods: {}
}
</script>
<style type="text/css">
.box {
  width: 100px;
  height: 100px;
  border: 1px solid #000;
}
</style>
